In the picture
#2 + #4 + #20 are the seals - To me it looks like all three have the springs facing inward towards the gear oil
If you put the outer seal spring #4 facing outward toward the drivers , i dont think it would take much time before ice , moisture , water freezing would take that spring out in no time along with corrosion - Correct me if im wrong Scott
Also see part #11 The magnetic pickup for speed sensor - When i was putting everthing together i noticed that was cracked in three places all the way through - Might have come apart down the road as its only plastic - Is cheap in price but had to order one through cat